Design and Analysis of Experiments-Need for Design of Experiments [ISS (Statistical Services) Statistics Paper IV]: Questions 1 - 5 of 5

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Question number: 1

» Design and Analysis of Experiments » Need for Design of Experiments

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Appeared in Year: 2010

Essay Question▾

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Discuss the layout for 23 factorial experiment with suitable illustration, how would you carry out the analysis of such a design?

Explanation

Here we will have 3 factors each at two levels. Let A, B, C be three factors under study and let small letters a, b, and c represent the two levels of each of the corresponding factors. say,

( ), there will be treatment combinations in all.

The 8 treatment combinations will be

1, a, b, ab, c, ac, b

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Question number: 2

» Design and Analysis of Experiments » Need for Design of Experiments

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Appeared in Year: 2010

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What is confounding in a factorial experiment? Explain why it is necessary. Enumerate the advantages and disadvantages for confounding.

Explanation

The process by which unimportant comparisons are mixed up with the block comparisons, for assessing more important comparisons with greater precision is called confounding. It is also defined as the technique of reducing the size of a replication over a number of blocks at the cost of losing some information on some effect, which is not of much pra

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Question number: 3

» Design and Analysis of Experiments » Need for Design of Experiments

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Appeared in Year: 2013

Essay Question▾

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Explain the need of Factorial experiments. Develop a method to estimate all main effects and interaction effects of -factorial experiment. Give its ANOVA table.

Explanation

Need of Factorial experiments:

A factorial design is used to understand the effect of two or more independent variables upon a single dependent variable. Several factors affect simultaneously the characteristic under study. Factorial experiments helps to study the main effects and the interaction effects among different factors.

For example, in Agric

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Question number: 4

» Design and Analysis of Experiments » Need for Design of Experiments

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Appeared in Year: 2009

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What do you mean by confounding in a factorial experiment? Explain how you will obtain the confounded interactions from a key block.

Explanation

Confounding: Confounding implies thatdevice of reducing the block size by making one or more interaction contrasts identical with block contrasts is taken. It is technique to decrease size of a replication over a number of blocks at the cost of losing some information on some effect which is not of much practical importance.

The device of confoundin

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Question number: 5

» Design and Analysis of Experiments » Need for Design of Experiments

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Appeared in Year: 2014

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What is meant by the design of experiment? Describe the situations in which the three basic designs, namely CRD, RBD and LSD are appropriate, and state the rule or rules by which treatments are allocated to units in these designs.

Explanation

Design of experiment:

Design of experiments may be defined a systematic method to determine the relationship between factors affecting a process and the output of that process.

The design of experiment includes:

(i) Planning of the experiment

(ii) Obtaining the relevant information from it regarding the statistical hypothesis under study

(iii) Making a

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